LIU Riverhead had a total enrollment of 106 students in 2017. The full-time enrollment at LIU Riverhead is 36 students and the part-time enrollment is 70. This means that 34% of students enrolled at LIU Riverhead are enrolled full-time.

The enrolled student population at LIU Riverhead, both undergraduate and graduate, is 46.2% White, 13.2% Hispanic or Latino, 3.77% Black or African American, 2.83% Two or More Races, 1.89% Asian, and 0.943% American Indian or Alaska Native.

Students enrolled at LIU Riverhead in full-time Undergraduate programs are most commonly White Female (42.3%), followed by Hispanic or Latino Female (25%) and White Male (13.5%). Students enrolled in full-time Graduate programs are most commonly White Female (43.6%), followed by White Male (15.4%) and Black or African American Female (7.69%).